COINCIDENT CHECK

 

Description: This option checks for coincident nodes that may be in the displayed or other part(s) of the model.  Coincident nodes are defined as having distance between each other that is less than or equal to a specified tolerance.  The DSI default tolerance, which is the lowest tolerance DSI allows, is 0.01 units.  The user may increase the default tolerance as necessary.

 

The COINCIDENT NODE CHECK merges two nodes in a coincident node group into one node and retains the lower node number (i.e., DSI combines two nodes that share the same location and renumbers the new node with the lower grid number).  DSI designates the higher grid number as unreferenced.

 

Usage:

 

1.   DSI prompts:

>   ENTER TOL (DEFAULT=0.01)

•   Any positive real number is a valid entry.

 

2.   After entering a tolerance, DSI prompts the user to select the nodes to be checked:

>   SELECT OPTION FOR COINCIDENT NODE CHECK

 

 Cancel Exits the user to the NODE OPTIONS menu without executing COINCIDENT NODE CHECK.

•   After selecting one of the previous options, or if no coincident nodes are found, the user returns to the NODE OPTIONS menu.

•   If coincident nodes are found, DSI prompts:

>   XXXX   COINCIDENT NODES FOUND

>   MERGE COINCIDENT NODES? (Y/N)

•   YES merges the coincident nodes.

•    NO returns the user to the NODE OPTIONS menu.

•   Coincident nodes become unreferenced nodes and are represented by asterisks (*).

•   Some or all of the unreferenced nodes may be deleted using the DELETE UNREFERENCED NODE option.

•   DSI will not merge nodes belonging to the same element (i.e. zero length elements with unique node numbers will not be merged, avoiding the degeneration of the element).